scholarly journals Estimating Recreational and Commercial Fishing Effort for European LobsterHomarus gammarusby Strip Transect Sampling

2011 ◽  
Vol 3 (1) ◽  
pp. 383-393 ◽  
Author(s):  
Alf Ring Kleiven ◽  
Esben Moland Olsen ◽  
Jon Helge Vølstad
Keyword(s):  
Fishing Effort ◽  
Commercial Fishing ◽  
Transect Sampling ◽  
Strip Transect

No fear of bankruptcy: the innate self-subsidizing forces in recreational fishing

2019 ◽  
Vol 77 (6) ◽  
pp. 2304-2307 ◽  
Author(s):  
Alf Ring Kleiven ◽  
Even Moland ◽  
U Rashid Sumaila
Keyword(s):  
Fishing Effort ◽  
The Self ◽  
High Rate ◽  
Recreational Fishing ◽  
Commercial Fishing ◽  
Fishing Industry ◽  
Fishing Sector ◽  
Local Residents

Abstract Recreational fishing, by both local residents and tourists, is a popular activity globally. The behaviour and motivation of recreational fishers is different from those of commercial fishers. Unlike the latter, the former are not dependent on making profits to continue fishing. Rather, the value of recreational fishing to those who engage in it is a combination of catches and experience values. The latter value implies that recreational fishers might continue fishing when they should not, analogous to the effect of subsidy in the commercial fishing sector. Hence, the term “self-subsidizing”: a fishery as one in which fishers subsidize themselves through an economic investment in gear and time from their non-fishery-based earnings. The consequence of which is that recreational fishers can continue fishing long after the commercial fishing industry has stopped fishing because their operations have become economically unviable. There is reason to argue that in many areas, recreational fishing effort, due to the self-subsidizing mechanism, is sustained at a high rate while stocks decrease. In this contribution, we describe the innate self-subsidizing forces in recreational fishing and discuss their implications.

scholarly journals The value of commercial fish size distribution recorded at haul by haul compared to trip by trip

2020 ◽  
Author(s):  
Kristian S Plet-Hansen ◽  
François Bastardie ◽  
Clara Ulrich
Keyword(s):  
Fishing Effort ◽  
Fish Distribution ◽  
Minimum Size ◽  
Dependent Data ◽  
Commercial Fishing ◽  
Commercial Fish ◽  
Traceability System ◽  
Fishing Vessels ◽  
Set Up ◽  
Abundance And Distribution

Abstract Data from commercial fishing vessels may enhance the range of observations available for monitoring the marine environment. However, effort and catch data provide information on fish distribution with a bias due to spatial targeting and selectivity. Here, we measured the shortcomings of standard fishery-dependent data and advocate for the utilization of more precise datasets indirectly collected by the commercial fishery. Data from a Danish traceability system, which records size of commercial fish at the haul level, are held against the set-up of current eLog and sales slips’ data collected for the Danish fisheries. We showed that the most accurate mapping of the spatial distribution of catches per size group is not only possible through size records collected at the haul level but also by high resolution on fishing effort data. In Europe, the regulation to land all catches with a quota or minimum size limit, including unwanted, has increased the focus on avoidance and discards; we show the potential of such data sources to inform on fish abundance and distribution, especially of importance where fishery-dependent data are the only source of information.

scholarly journals Exploring Spatiotemporal Trends in Commercial Fishing Effort of an Abalone Fishing Zone: A GIS-Based Hotspot Model

PLoS ONE ◽  
2015 ◽  
Vol 10 (5) ◽  
pp. e0122995 ◽  
Author(s):  
M. Ali Jalali ◽  
Daniel Ierodiaconou ◽  
Harry Gorfine ◽  
Jacquomo Monk ◽  
Alex Rattray
Keyword(s):  
Fishing Effort ◽  
Commercial Fishing ◽  
Spatiotemporal Trends

Island in the Stream: Oceanography and Fisheries of the Charleston Bump

2001 ◽  
Keyword(s):  
South Carolina ◽  
Public Involvement ◽  
Public Awareness ◽  
Policy Issue ◽  
Fishing Effort ◽  
Commercial Fishing ◽  
Public Controversy ◽  
Public Policy Issue ◽  
Fisheries Policy ◽  
Charleston Bump

<em>Abstract.</em>—Competition between commercial and recreational fishers for fishery resources is common throughout the United States. This competition for resources occurs throughout the south Atlantic region. However, competition around an area known as the Charleston Bump led to controversy and public calls for closure of that area to commercial fishing. In 1997, controversy erupted over the proposed lease of a fish processing facility at the newly completed Charleston Maritime Center. A group of commercial fishermen proposed to open the Maritime Center’s facilities to all types of commercial fishing craft, but with emphasis on longline vessels. The high level of public awareness and knowledge of South Carolina’s offshore fisheries helped to catapult the Charleston Bump to the forefront of state and federal marine fisheries policy, research, and management. Parties to this dispute looked to state fisheries managers for interpretation of technical information upon which to base their decisions. However, fisheries managers soon learned that the data on the significance of the Charleston Bump as a nursery area were inconsistent and spotty. This lack of reliable data left the managers in a policy dilemma: how to make technical recommendations on the management of the fisheries of the Charleston Bump given the lack of data. The fisheries managers responded by acknowledging the lack of data and suggesting that a comprehensive ecological analysis of the Charleston Bump be performed. In addition, the fisheries managers responded by interpreting the data based on the precautionary principle (i.e., do no harm to the resource) and advised the parties to the Maritime Center dispute against any move that might consolidate fishing effort on the Charleston Bump. The purpose of this paper is to: (1) document the approach taken by the State of South Carolina to analyze this public controversy and; (2) describe how public involvement in the development of a local public policy issue can create the need for further scientific inquiry and research. The authors present an overview of this controversy and highlight how public perceptions and demand for action resulted in a policy stance. The authors describe how the public’s direct involvement led not only to the colloquium but also to a renewed scientific interest in the Charleston Bump.

Economic and Social Implications of the Main Policy Alternatives for Controlling Fishing Effort

1979 ◽  
Vol 36 (7) ◽  
pp. 742-752 ◽  
Author(s):  
J. A. Crutchfield
Keyword(s):  
Open Access ◽  
Fishing Effort ◽  
Commercial Fishing ◽  
Fishing Mortality ◽  
Short Term ◽  
Flexible Control ◽  
Policy Alternatives ◽  
Consumer Prices ◽  
Limited Entry ◽  
Direct Measures

Discussion of the need for economic rationalization has led to increasing interest in alternative strategies to control fishing effort in efficient ways. Three basic alternatives are considered: taxation, control of fishing inputs ("limited entry"), and direct limitation of output through individual fisherman quotas. Each is analyzed in terms of specified elements of economic efficiency, distribution effects, freedom to choose fishing methods and strategies, and administrative feasibility. It is noted that in practice all would be used in combination with other direct measures to assure flexible control over fishing mortality. A number of common objections to economic rationalization of open access fisheries (e.g. creation of monopoly power, unemployment, failure to reduce consumer prices, and nonmonetary values associated with fishing) are analyzed and rejected as largely invalid. While the inherent short-term instability of commercial fishing and data problems preclude any "maximizing" model of a rationalized fishery, the prospects for workable programs leading to improved economic performance without adverse societal impacts are excellent. Key words: fishery economics, taxation, limited entry, quotas, open access fishery, sociological aspects

scholarly journals Optimal fishing effort benefits fisheries and conservation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Adam Rees ◽  
Emma V. Sheehan ◽  
Martin J. Attrill
Keyword(s):  
Marine Protected Area ◽  
Fishing Effort ◽  
Commercial Fishing ◽  
Negative Effects ◽  
Temperate Reef ◽  
Ecosystem Effects ◽  
Significant Step ◽  
Fishing Density ◽  
The Uk ◽  
First Time

AbstractThe ecosystem effects of all commercial fishing methods need to be fully understood in order to manage our marine environments more effectively. The impacts associated with the most damaging mobile fishing methods are well documented leading to such methods being removed from some partially protected areas. In contrast, the impacts on the ecosystem from static fishing methods, such as pot fishing, are less well understood. Despite commercial pot fishing increasing within the UK, there are very few long term studies (> 1 year) that consider the effects of commercial pot fishing on temperate marine ecosystems. Here we present the results from a controlled field experiment where areas of temperate reef were exposed to a pot fishing density gradient over 4 years within a Marine Protected Area (MPA), simulating scenarios both above and below current levels of pot fishing effort. After 4 years we demonstrate for the first time negative effects associated with high levels of pot fishing effort both on reef building epibiota and commercially targeted species, contrary to existing evidence. Based on this new evidence we quantify a threshold for sustainable pot fishing demonstrating a significant step towards developing well-managed pot fisheries within partially protected temperate MPAs.

scholarly journals Causes of Mortality for Endangered Antillean Manatees in Cuba

2021 ◽  
Vol 8 ◽  
Author(s):  
Anmari Alvarez-Alemán ◽  
Eddy García Alfonso ◽  
James A. Powell ◽  
Charles A. Jacoby ◽  
James D. Austin ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Fishing Effort ◽  
Commercial Fishing ◽  
Fishing Gear ◽  
Illegal Hunting ◽  
Lack Of Information ◽  
Causes Of Mortality ◽  
Antillean Manatees ◽  
Causes Of Deaths

The Antillean manatee is categorized as endangered by the International Union for the Conservation of Nature primarily due to its low abundance. Further declines in abundance are expected due to a group of human related threats that include illegal hunting, fatal interactions with fishing gear, increasing watercraft traffic, and pollution. The nature of current threats is not well described for every critical population of manatees. In particular, threats to manatees have not been documented or evaluated in a systematic manner in coastal waters surrounding Cuba, which is a major reason why plans specifically addressing conservation of manatees in Cuba have not been implemented. To address this lack of information, we assessed patterns in various threats by reviewing reports of stranded (alive or dead) and captured manatees, with some reports being historical and others consistently available since 2001. For 94% of the contemporary cases, carcasses of dead animals were reported; the remainder (6%) involved live manatees and subsequent efforts to rescue and rehabilitate them. Documented causes of mortality included poaching (38%), entanglement in fishing gear (10%), deaths of dependent calves (2.5%), and boat collisions (2.5%). The cause of death for the remaining 47% of reports could not be determined. Mortalities were highest in areas with intensive commercial fishing effort, and mortalities in marine protected areas indicated a need for improved management. These initial findings provide the first estimates of the magnitude of mortality of manatees in Cuba and yield valuable insights into the causes of deaths. The existence of intense and poorly regulated fishing in certain areas, including protected areas, represents a potentially significant threat to manatees. The effects and management of this activity, especially in habitats that are critical for manatees, merit further attention.

At-Sea Movements Of Female Australian Fur Seals Arctocephalus Pusillus Doriferus

2002 ◽  
Vol 24 (1) ◽  
pp. 65 ◽  
Author(s):  
CL Littnan ◽  
JPY Arnould
Keyword(s):  
Small Area ◽  
Fishing Effort ◽  
Commercial Fishing ◽  
Middle Phase ◽  
Average Speed ◽  
The Third ◽  
Foraging Area ◽  
Fur Seals ◽  
Satellite Transmitters ◽  
The Mean

In May 1999, satellite transmitters were deployed on three lactating female Australian fur seals (Arctocephalus pusillus doriferus) at Kanowna Island (39� 10' S, 146� 18' E) and at-sea movements were recorded for 65 ? 174 days. The mean foraging trip and on-shore durations (8 and 2 days, respectively) were not significantly different to that previously reported for the species. The seals all foraged in three separate areas of Bass Strait with each individual repeatedly returning to the same general location. Movements during foraging trips fell into two distinct patterns. In one pattern, displayed by two individuals, the females travelled directly to a presumed foraging area. In this trip type, outward and return travel consisted of relatively constant headings at moderate speed (1.37 � 0.07 m/s) while the middle phase was characterised by repeated changes in direction within a small area and significantly lower speeds (0.82 � 0.07 m/s). The second pattern, displayed by the third individual, consisted of a looping path with relatively uniform average speed (1.14 � 0.06 m/s) throughout the trip. The three foraging areas were: 1) inshore area between Wilsons Promontory and Lakes Entrance; 2) offshore in proximity to The Skerries; and 3) up to 200 km south of Wilsons Promontory in central Bass Strait. The foraging areas used by these seals overlap with regions of commercial fishing effort raising the potential for some conflict.

scholarly journals Can we infer dredge fishing effort from macrobenthic community structure?

2009 ◽  
Vol 66 (10) ◽  
pp. 2121-2132 ◽  
Author(s):  
M. B. Gaspar ◽  
S. Carvalho ◽  
R. Constantino ◽  
J. Tata-Regala ◽  
J. Cúrdia ◽  
...  
Keyword(s):  
Community Structure ◽  
Trophic Structure ◽  
Species Abundance ◽  
Taxonomic Diversity ◽  
Fishing Effort ◽  
Macrobenthic Community ◽  
Commercial Fishing ◽  
Macrobenthic Communities ◽  
Macrobenthic Community Structure ◽  
Closed Season

Abstract Gaspar, M. B., Carvalho, S., Constantino, R., Tata-Regala, J., Cúrdia, J., and Monteiro, C. C. 2009. Can we infer dredge fishing effort from macrobenthic community structure? – ICES Journal of Marine Science, 66: 2121–2132. The effects of commercial fishing effort (FE) on macrobenthic community structure were analysed in geographically related fishing grounds separated into three groups: non-exploited (NE), moderately exploited (ME), and highly exploited (HE). Number of species, abundance, Margalef species richness, and Shannon–Wiener diversity were significantly higher in NE than in exploited areas. The first two were also significantly higher in HE than in ME areas. Measures of taxonomic diversity differed depending on whether annelids, molluscs, and crustaceans were combined or analysed separately. Crustaceans seemed to be the most vulnerable to bivalve dredging because significantly lower values were observed for them in the HE areas than in the ME and NE areas for this group. Although the samples were taken at the end of the closed season, macrobenthic communities still showed differences that may be related to FE, especially in trophic structure. Carnivory was particularly dominant in HE areas. The ratio of carnivory to filter-feeding was significantly correlated with FE, with higher values being observed in HE areas and lower values in NE areas.

Sign in / Sign up

Export Citation Format

Share Document